feat: the assistant keeps several chats - the current one named in the header, the list under its arrow to open or delete; actions as compact cards; folding parts open smoothly

internal/server/db.go

@@ -128,6 +128,12 @@ CREATE TABLE IF NOT EXISTS forward_rules (
 		    admin_id INTEGER NOT NULL REFERENCES admins(id) ON DELETE CASCADE,
 		    role TEXT NOT NULL, content TEXT NOT NULL, at INTEGER NOT NULL)`,
 		`CREATE INDEX IF NOT EXISTS ai_messages_admin ON ai_messages(admin_id, id)`,
+		`ALTER TABLE ai_messages ADD COLUMN chat_id INTEGER NOT NULL DEFAULT 0`,
+		`CREATE TABLE IF NOT EXISTS ai_chats (
+		    id INTEGER PRIMARY KEY AUTOINCREMENT,
+		    admin_id INTEGER NOT NULL REFERENCES admins(id) ON DELETE CASCADE,
+		    title TEXT NOT NULL, created INTEGER NOT NULL, updated INTEGER NOT NULL)`,
+		`CREATE INDEX IF NOT EXISTS ai_messages_chat ON ai_messages(chat_id, id)`,
 		`CREATE TABLE IF NOT EXISTS ssh_hosts (
 		    id INTEGER PRIMARY KEY AUTOINCREMENT,
 		    admin_id INTEGER NOT NULL REFERENCES admins(id) ON DELETE CASCADE,